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ARTICLE-42: Validity and continuance in force of treaties     [go to this ARTICLE]
... Validity and continuance in force of treaties ...
... 1. The validity of a treaty or of the consent of a State to be bound by a treaty may be impeached only through the application of the present Convention. ...


ARTICLE-45: Loss of a right to invoke a ground for invalidating, terminating, withdrawing from or suspending the operation of a treaty     [go to this ARTICLE]
... (a) it shall have expressly agreed that the treaty is valid or remains in force or continues in operation, as the case may be; or ...
... (b) it must by reason of its conduct be considered as having acquiesced in the validity of the treaty or in its maintenance in force or in operation, as the case may be. ...


... 3. An error relating only to the wording of the text of a treaty does not affect its validity; article 79 then applies. ...


ARTICLE-65: Procedure to be followed with respect to invalidity, termination, withdrawal from or suspension of the operation of a treaty     [go to this ARTICLE]
... 1. A party which, under the provisions of the present Convention, invokes either a defect in its consent to be bound by a treaty or a ground for impeaching the validity of a treaty, terminating it, withdrawing from it or suspending its operation, must notify the other parties of its claim. The notification shall indicate the measure proposed to be taken with respect to the treaty and the reasons therefor. ...